The low cost device is designed to promote computing skills to school children and 3.5m have been sold worldwide. One of the devices will be given to all foreign leaders at the Nato summit.

Mr Cable said the UK Investment Summit, on 20 and 21 November, was a chance to "show Wales' strengths as an excellent place to do business and one that is open to foreign investment".

He added: "The [UK] government's industrial strategy is giving businesses the confidence to invest over the long term, creating the type of high skilled jobs this country needs to thrive in the future."

'Compelling'

"This will help create a stronger and fairer economy in Wales and the rest of the UK."